Kindly search tires, or tyres in forums as this thing has been discussed in details many times.
the rule of the thumb is to stay as close to the stock size diameter as possible for a trouble free ride.
The stock size is 175/70/14 so you can go upto 185,195,205/70/14 or --/65-14
If you go for 15 inch rims then keep the profile (hight) to 60 max.